US4144875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar collector comprising an entrance window consisting of evacuated tubes
Assignee: US Philips Corp
•
Filing: 1977-04-01
•
Granted: 1979-03-20
•
Expires: 1997-04-01
Abstract
Abstract A solar collector comprising a heat exchanger having a corrugated surface and an entrance window composed of evacuated transparent tubes respectively in contact with the corrugations.
Inventors
- 👤 Richard Bruno
- 👤 Wilhelm Hermann
- 👤 Horst Horster
- 👤 Reinhard Kersten
- 👤 Klaus Klinkenberg
- 👤 Faramarz Mahdjuri
- 👤 John Bannigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:37
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/50; F24S10/70; F24S10/72; F24S10/75; F24S10/753; F24S40/00; F24S40/40; F24S40/46; F24S80/00; F24S80/50; F24S80/54; F24S80/56; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
94 words
A solar collector, which comprises a plate-shaped heat exchanger having a corrugated profile, said heat exchanger being provided with a plurality of ducts and serving to transfer heat derived from collected solar radiation during operation to a heat transport medium fed through said ducts, and a heat-insulating entrance window for solar radiation consisting of a plurality of sealed and evacuated transparent tubes adjacently arranged in contact with each other, the tube portions facing the heat exchanger being in contact with the corrugations therein, and said tube portions and said corrugations being of complementary shape.
Claim 2
Dependent Claim
94 words
A solar collector, which comprises a plate-shaped heat exchanger having a corrugated profile, said heat exchanger being provided with a plurality of ducts and serving to transfer heat derived from collected solar radiation during operation to a heat transport medium fed through said ducts, and a heat-insulating entrance window for solar radiation consisting of a plurality of sealed and evacuated transparent tubes adjacently arranged in contact with each other, the tube portions facing the heat exchanger being in contact with the corrugations therein, and said tube portions and said corrugations being of complementary shape.
Claim 3
Dependent Claim
25 words
A solar collector according to claim 1, in which the heat exchanger has a corrugated double-walled construction forming the ducts for the heat transport medium.
Claim 4
Dependent Claim
74 words
A solar collector according to claim 2, in which the rear wall of the double-walled construction remote from the entrance window is corrugated and is rigidly constructed, and the front wall accommodates the tube portions and consists of a foil, only the edges of which are sealed to the rear wall, said foil being associated with the crests of the corrugations so that it projects into the individual corrugations in a movably suspended manner.
Claim 5
Dependent Claim
26 words
A solar collector according to claim 3, in which the tube portions are loosely arranged on the foil and are anchored thereon in a resilient manner.
Claim 6
Dependent Claim
24 words
A solar collector according to claim 1, in which the ducts for the heat transport medium are situated adjacent the bottoms of the corrugations.
Claim 7
Dependent Claim
23 words
A solar collector according to claim 1, in which the ducts for the heat transport medium extend inside the crests of the corrugations.
Claim 8
Dependent Claim
48 words
A solar collector according to claim 1 in which the inner surfaces of the tube portions facing the heat exchanger are provided with a layer of a material having an absorption factor α ≧ 0.85 for solar radiation and an emission factor ε ≦ 0.3 for heat radiation.
Claim 9
Dependent Claim
41 words
A solar collector according to claim 7, in which said layer extends over a cross-sectional tubular portion of 120° to 160° and adjoins, on each longitudinal side, a reflective metal strip extending over a cross-sectional tubular portion of 15° to 25°.
Claim 10
Dependent Claim
42 words
A solar collector according to claim 7, in which said layer consists of a black material on a metal substrate, with the metal substrate extending over a cross-sectional tubular portion of 15° to 25° beyond each longitudinal side of the black material.
Claim 11
Dependent Claim
48 words
A solar collector according to claim 1, in which the outer surfaces of the tube portions facing the heat exchanger are provided with a layer of a material having an absorption factor α ≧ 0.85 for solar radiation and an emission factor ε ≦ 0.3 for heat radiation.
Claim 12
Dependent Claim
27 words
A solar collector according to claim 1, in which the heat exchanger consists of a material having an absorption factor α 1 ≧ 0.85 for heat radiation.
Claim 13
Dependent Claim
40 words
A solar collector according to claim 1, in which the surface of the heat exchanger in contact with the entrance window is covered with a layer of a material having an absorption factor α 1 ≧ 0.85, for heat radiation.
Claim 14
Dependent Claim
23 words
A solar collector according to claim 1, in which the tube portions are connected to the heat exchanger by means of an adhesive.
Claim 15
Dependent Claim
13 words
A solar collector according to claim 13, in which the adhesive is black.
Claim 16
Dependent Claim
31 words
A solar collector according to claim 1, in which the inner surface of at least the tube portions remote from the heat exchanger is provided with a light-transmitting but infrared-reflective layer.
References Cited (Backward Citations)
US1801710A
Cited
US2391108A
Cited
US2998006A
Cited
US3981293A
Cited
US3952725A
Cited
US4029080A
Cited
US4015584A
Cited
US4054125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |